AndroidPopupWindow

content_popup.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"
              android:orientation="vertical"
              android:background="#FF7F50"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content">

    <TextView
            android:drawableLeft="@drawable/baseline_visibility_black_48dp"
            android:gravity="center"
            android:text="一行目"
            android:layout_width="200dp"
            android:layout_height="wrap_content"/>
    <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#FFD700"/>
    <TextView
            android:drawableLeft="@drawable/baseline_accessibility_black_48dp"
            android:gravity="center"
            android:text="二行目"
            android:layout_width="200dp"
            android:layout_height="wrap_content"/>
    <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#FFD700"/>

    <TextView
            android:drawableLeft="@drawable/baseline_favorite_black_48dp"
            android:gravity="center"
            android:text="三行目"
            android:layout_width="200dp"
            android:layout_height="wrap_content"/>

</LinearLayout>

MainActivity_v1.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        button.setOnClickListener { button ->
            val view = LayoutInflater.from(this).inflate(R.layout.content_popup, null)
            val popupWindow = PopupWindow(view).apply {
                isOutsideTouchable = true
                isFocusable = true
            }
            popupWindow.showAsDropDown(button)
        }
    }
}